April 12 (Wed) at 13:30 - 15:00, 2023 (JST)
  • Xavier Roca-Maza (Associate Professor, Department of Physics, University of Milan, Italy)
Tomoya Naito

This contribution reviews a selection of available constraints to the nuclear equation of state (EoS) around saturation density from nuclear structure calculations on ground and collective excited state properties of atomic nuclei [1]. It concentrates on predictions based on self-consistent mean-field calculations, which can be considered as an approximate realization of an exact energy density functional (EDF). Mostly, EDFs are currently derived from effective interactions commonly fitted to nuclear masses, charge radii and, in many cases, also to pseudo-data such as nuclear matter properties. Although in a model dependent way, EDFs constitute nowadays a unique tool to reliablyand consistently access bulk ground state and collective excited state properties of atomic nuclei along the nuclear chart as well as the EoS. The impact on the EoS of the new CREx [2] and PREx [3] measurments of the parity violating asymmetry (ground state observable) in 48Ca and 208Pb, respectively, will be also discussed [4,5] and compared to previously presented results on collective excitations. As the main conclusion, the isospin dependence of the nuclear EoS around saturation density and, to a lesser extent, the nuclear matter incompressibility remain to be accurately determined. Experimental and theoretical efforts in finding and measuring observables specially sensitive to the EoS properties are of paramount importance, not only for low-energy nuclear physics but also for nuclear astrophysics applications.


  1. X. Roca-Maza, N. Paar, Nuclear equation of state from ground and collective excited state properties of nuclei, Prog. Part. Nucl. Phys. 101, 96 (2018), doi: 10.1016/j.ppnp.2018.04.001
  2. D. Adhikari et al. (CREx collaboration), Precision Determination of the Neutral Weak Form Factor of 48Ca, Phys. Rev. Lett. 129, 042501 (2022), doi: 10.1103/PhysRevLett.129.042501
  3. S. Abrahamyan et al. (HAPPEX and PREX Collaborations), New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei, Phys. Rev. Lett. 109, 192501 (2012), doi: 10.1103/PhysRevLett.109.192501
  4. P.-G. Reinhard, X. Roca-Maza, W. Nazarewicz, Information Content of the Parity-Violating Asymmetry in 208Pb, Phys. Rev. Lett. 127, 232501 (2021), doi: 10.1103/PhysRevLett.127.232501
  5. P.-G. Reinhard, X. Roca-Maza, W. Nazarewicz, Combined Theoretical Analysis of the Parity-Violating Asymmetry for 48Ca and 208Pb, Phys. Rev. Lett. 129, 232501 (2022), doi: 10.1103/PhysRevLett.129.232501

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